The correlation between structure and charge transport of polypyrroles

The results of temperature dependence of de conductivity (sigma(dc)(T)), ma gnetic susceptibility (chi) and X-ray photoelectron spectroscopy (XPS) are compared for electrochemically and chemically synthesized polypyrrole (PPy) samples. From the XPS experiments, interchain links or side chains for che mically synthesized PPy soluble in organic solvents are reduced by similar to 10% compared to those of electrochemically synthesized PPy because of ch emical process using large size dopant. Based on temperature dependence of sigma(dc)(T), the systems are in the insulator or the critical regime. The effects of dopant on structure and charge transport of PPy systems are disc ussed.